Take-up for momentum-brakes.



P. S. MORGAN.

TAKE-UP FOR MOMENTUM BRAKES.

APPLICATION FILED SEPT. 9. 19w,

1 3,23 1 ,284 Patented. June 26, 19W.

2 SHEETS--SHEET I WETNESSES: mvzmo 44 Pormmsr Mom/m.

BY 7 mzw w 42M ATTORNEY P S. MORGAN TAKE-UP FOR MOMENTUM BRAKES.

APPLICATION FILED SEPT. 9. 1915.

1L,231,28f%o Patented J1me 26, 1917.

2 SHEETS-SHET 2.

WITNESSES: 2 5

INVENTOR ATTORNEY UNTTED TAE2 AENT OFFTQE.

PORTER S. MORGAN, OF NORWALK, CONNECTICUT, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO MOMENTUM BRAKE CORPORATION, OF NEW YORK, N. Y., A COR- PORATION OF NEW YORK.

TAKE-UP FOR 'MOMENTUM-BRAKES.

I Specification of Letters Patent. Patgnt'edlun 26 191% Application filed September 9, 1915. Serial No. 49,712.

To all whom it may concern.

Be it known that I, Pon'rnn S. MORGAN, a citizen of the United States, and a resident of Norwalk, in the county of Fairficld and State of Connecticut, have invented a certain new and useful Take-Up for Momentum- Brakes, of which the following is a specification.

My invention relates to means for automatically taking up the wear on the shoes or brake bands of momentum brakes. The objects being to compensate for the wear on the braking surfaces; to keep all the working parts or the mechanism of the brakes in correct relationship during the life of the brake shoes or hands; to obviate the necessity of making hand adjustments from time to time with the attending danger of having such adjustmentsoverlooked and to keep the brakes working at their maximum efficiency through the correct functioning of. all the parts of the brake mechanism. v

Theseveral objects of my invention as set forth above, and the particular methods through which I attain these are now to be described and are illustrated in the accompanying drawings forming part of this specification, in which similar characters of reference denote like or corresponding parts throughout the several views. Figures 1, and 3 illustrate my present invention, as applied to the momentum brake which is the subject of a patent application of mine entitled Brake mechanism filed at the I United States Patent Oflice May 12, 1915, and bearing the Serial N 0.27- ,523 of which Fig. 1 is a side elevation of my brake mechanism shown in a free position, as applied to a car truck with my take up mechanism incorporated therein; 2 is a .plan view of Fig. 1, and Fig. 3: is the same view as Fig. 1 but. with the brakcshown in an operative position. Figs. 1 to 9 inclusive illustrate my take up as applied to the invention in my application entitled Momentum brakes filed in the United States Patent Office March 22, 1915, and bearing the Scrial No. 16,089. Of the Figs. 4 to 9 inclusive, Fig. 1 is a side elevation of my momentum hand brake in a free position with my present invention applied thereto; Fig. 5 is a partial plan view of my take up as applied to Fig. 4:; Fig. 6 lllustrates a partial View of Fig. 4c in an operative position; Fig. 7

is a partial section and plan on the line A, B of Fig. 1; Fig. 8 is a perspective view of the. momentum lever used in operating the brake band and F ig. 9 is a partial side eleva tion of a modification of the brake shown in Fig. -l-, together with the connection to operate the take up.

Referring particularly to Fig. 1 of the drawings, numerals 1 and 2 are the car axles, to which are secured the wheels 3 and l. A brake shoe 5 is arranged to engage car wheel 3 and is secured against turning by being linked at 6 to the frame 7. The brake shoe 8 is arranged to engage the car wheel 1- through the tilting of the lever 9 to which it is pivoted at 10. The lever 9, which will hereafter. be referred to as the momentum lever, is adapted for angular rotation about the pivoting point 11 through which it is connected to the brake shoe 5 at pivot point 12 by links and take up mechanism which will hereafter be described. The momentum lever 9 is controlled in its angular rotation or tilting by the arm 18 extending at right angles from it and connected at 11- to the hand control lever (not shown) by the rod 15. When the brake is free, as shown in Fig. 1, the momentum lever is held in contact with two fulcrum or anchorage edges 16 and17 attached to the frame 7, one above and one below the momentum lever 9, which is .thus held on a line radial to the wheel 4. and also in-line with the link mechanism connecting 11 and 12.

I will now describe my take up mechanism in detail. A forked frame 18 is pivoted at 11 and 19 to the momentum lever 9. Frame 18 carries a ratchet wheel 20, secured to the shaft 21 which is journaled to one member of the fame 18. This ratchet wheel is adapted to be turned, step by step, in a counter-clockwise direction by the arm 22, loosely mounted on the shaft 20 and the pawl 23 engaging the ratchet wheel, which is prerented from turninghack by the pawl 2 lpivoted to the frame 18. The arm 22 is connected by the link 25 with the arm 13 at 26. The shaft 21 hassecured t9 it the bevel gear 27 which meshes with a gear 28 secured to a shaft 29 journaled in the end of the frame 18. This shaft is secured against axial movement by the hub of the gear 28 and a collar 30 secured to the shaft 29. The end of this shaft is threaded and enters a tapped hole in the end of the forked frame 31, which is pivoted to the brake shoe 5 at 12. The screw is so arranged that a rotawheels are turning in the direction of the arrow 32, the control rod 15 is moved in the direction of the arrow 33; the resulting ac tion and the positions then assumed by the brake parts will be shown in Fig. 3, where the momentum lever 9 in tilting has brought the brake shoes 5 and 8 into contact with their respective brake wheels, and the wheel 4 in rotating has brought the momentum lever 9 into firm contact with the anchorage edge 16, which, through the frictional drag of the brake shoe 8, tends to further increase the tilting of the momentum lever and to augment the braking action. \Vhen this tilting of the momentum lever reaches the maximum arranged for, and determined by the wearon the brake shoes and brake wheels, the arm 22 will swing far enough in the direction of the arrow 33 for the pawl 23 to engage the next tooth of the ratchet wheel 20 and when the control rod 15 returns the brake to the neutral or free position, shown in Fig. 1, the ratchet wheel will be turned the correct angular distance to cause the screw connected to the gear 28 to separate the frames 18 and 31 enough so that when the brake is again applied the momentum lever will not reach the maximum tilting angle it reached on the former swinging arm 22 and an adjustment made when the momentum lever returns to the free brake position, and this action will continue until the brake shoes are worn out.

Ill Fig. 4 a momentum brake of the band type is shown, but in which a momentum lever 9 and two anchorage edges 16 and 17 are used which are similar in design and operation to those shown in Figs. 1, 2 and o. The brake band 8 has the same function as the brake shoe 8 in Figs. 1, 2 and 3. The

ends of the brake band are pivoted to the momentum lever 9 at 34 and 35 and a tilting of the momentum lever as in Fig. 6 brings the brake band 8 into contact with the brake drum 4 and if .the drum is turning in the direction of the arrow 32, the frictionaldrag between the drum and band will rotate the band in the same direction and bring the momentum lever 9 into contact with the anchorage edge 16, which will tend to increase the angular tilting of the momentum lever 9, and thus augment the braking action of the brake band. As the arm 13 of the momentum lever 9 is connected by the rod 25 to a swinging arm 22 carrying a pawl 23 adapted to engage the ratchet wheel 20, and as this ratchet wheel is secured to a right and left hand screw 36, fitting into tapped nuts secured in the ends 37 and 38 of the brake band 8, a tilting to a maximum angle of the momentum lever 9 will cause the pawl 23 to engage the next tooth in the ratchet wheel and so cause an adjustment for wearwhen the momentum lever next returns to the neutral position, shown in Fig. 4. Fig. 8 shows the form of momentum lever used in Fig. 4 and Fig. 9 shows a modification of the band brake shown in Fiig. 4 in so far as an internal expanding band is used in Fig. 9 instead of the external contacting band of Fig. 4; otherwise the action of the brake shown in Fig. 9 is the same as that shown in Fig. 4.

It will be noted from the above description that the angle through which the momentum lever rotates or tilts is the determining factor in accomplishing the take up or adjustmentfor brake wear. Therefore I do not wish to limit myself to the use of a ratchet and screw mechanism for securing the said adjustment, as the tilting of the momentum lever through a certain angle may be used to actuate any of the well known means for this purpose and such meansmay be applied to any momentum brake, whether of the band or shoe type, that uses a tilting lever to control the braking action. Having fully described my invention so that anyone slcilled in the art, may make and construct the same and without limiting myself to any of the details or arrangement of parts, I claim:

1. Moving surfaces, brake members associated therewith and attached to a tiltable lever, stationary fulcrums adapted to engage the aforesaid lever for augmenting the brake retarding action and wear adjusting means connected with the brake members but operated bythe movement of the tiltable lever.

2. Rotary members, a brake shoe associated with one rotary member and connected to a tiltable lever, stationary fulcrums adapted toengage the tiltable lever, a second brake shoe associated with a second rotary memher and connected to the tiltable lever through a wear adjusting means, said Wear adjusting means being operated by. connection with the tiltable lever.

3. Rotary members, brake shoes associated therewith and attached to a .tiltable lever, stationary fulcrums adaptedto engage the tiltable lever for augmenting the brake retarding action for either direction of rota tion of the rotary members and wear adjusting means connected with the brakeshoes but operated by the movement of the tiltable lever.

4. Rotary members, brake shoes associated therewith and attached to a tiltable lever, stationary fulcrums adapted to engage the tiltable lever for augmenting the brake retarding action for either direction of r0tation of the rotary members and wear adjusting means connected with the brake shoes but operated by the movement of the tiltable lever in one direction.

5. Rotary members, brake shoes associated therewith and attached to. a tiltable lever, stationary iulcrums adapted to engage the tiltable lever for augmenting the brake retardin action for either direction of rotation oi the rotary members and wear adjusting means connected with the brake shoes but operated by the movement of the tiltable lever in one direction through a predetermined angle.

6. Rotary members, brake shoes associ ated therewith and attached to a tiltable lever, stationary fulcrums adapted to engage the tiltable lever for augmenting the brake retarding action for either direction of rotation of the rotary members and wear adjusting means connected with the brake shoes but operated by the movement of the tiltable lever through a predetermined angular distance.

7. In a momentum brake comprising a rotary member, a retarding member associated therewith, means connected with the re tarding member for initially applying it by hand and for further actuating it through the movement of the rotary member and wear adjusting means connected with the retarding member which is operated by the brake actuating means.

Signed at New York city in the county of New York and State of New York this 4th day of September A. D. 1915.

PORTER S. MORGAN.

Vitnesses:

EUGENE M. ENGLEMAN, A. W. SCHAUB.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

" Washington, D. G. 

